日历

#include <stdio.h>
#include <conio.h>
#include <stdlib.h>
#include <time.h>
int leap(int year )
{
if ((year %4 == 0) && (year % 100 != 0) || (year % 400 == 0))
{
return 1;
}
return 0;
}
void show(int year,int month)
{
const char month_str[][4]={"","Jan","Feb","Mar","Apl", "May","Jun","Jul","Aug","Sep","Oct","Nov","Dec"};
const int month_day[]={0,31,28,31,30,31,30,31,31,30,31,30,31};
int i,j,wdays,mdays,days;
for(i=1,days=0;i<year;i++)
{
if(leap(i))
{
days += 366;
}
else
{
days += 365;
}
}
for(i=1;i<month;i++)
{
if(i==2 && leap(year))
{
days+=29;
}
else
{
days+=month_day[i];
}
}
printf(" %s (%d)\n",month_str[month],year);
printf(" Mon Tue Wed Thu Fri Sat Sun\n");
wdays = days % 7;
for( j = 0; j < wdays; j++)
{
printf("%4c",' ');
}
if(month == 2 && leap(year))
{
mdays=29;
}
else
{
mdays= month_day[month];
}
for(i=1;i<=mdays;i++)
{
if( i > 1 && days % 7 == 0 )
{
printf("\n");
}
printf("%4d",i);
days=days+1;
}
printf("\n---------------------------\n"); }
void main()
{
time_t rawtime;
struct tm *info;
int year,month;
char ch;
time ( &rawtime );
info = localtime ( &rawtime );
year =info->tm_year + 1900;
month =info->tm_mon + 1;
while(1)
{
show(year,month);
printf("st Month\n");
printf("Right...Next Month\n");
printf("st Y ear\n");
printf("Down....Next Y ear\n");
printf("Esc.....Exit\n");
ch=getch();
switch(ch)
{
case 27://Ecs
exit(0);
case -32://Navigator
ch=getch();
if(ch==77)
{//Right
year+=(month==12)?1:0;
month=month%12+1;
}
else if(ch==75)
{//Left
year-=(month==1)?1:0;
month=(month-2+12)%12+1;
}
else if(ch==72)
{//Up
year--;
}
else if(ch==80)
{//Down
year++;
}
system("cls");
}
}
}。